Been there a couple of times.
Brother and I had separate ajoining bedrooms, one evening he had his then-girlfriend over for a few hours. I admit that i was listening, (i'm guessing they were kissing/petting)feeling at once jealous and turned on.
the other time, was in college, sharing a dorm with a guy. I had the top bunk, he had the lower. one night he had his girl over, i was trying to sleep while they were moving towards getting it on,
the jealosy and frustration on my part drove me out of the room, down the hall to a friend's room to crash for the night.
If that situation occured today, but i was the lucky one (along with the SO) i'm conflicted on how i would i would treat any '3rd wheel" ( of course being dual natured
